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Polymer composition

A technology of polymer and ethylene homopolymer, which is applied in the field of pipes and the production of polymer products, can solve the problems of difficulty in maintaining the diameter of pipes and failure to achieve

Active Publication Date: 2007-03-07
ボレアリステクノロジーオイ
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] A problem with making large diameter tubing, especially from multimodal polymeric materials such as bimodal, is that it is difficult to maintain a uniform diameter of the tubing
[0013] According to ISO 9080, the possible new pressure level of PE formulated should meet the requirements of PE125, which has not been realized at present

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～3

[0112] Tables 1-4 contain data relating to Examples 1, 2 and 3.

[0113] All examples include 500dm 3 The loop reactor and the pilot plant of the gas phase reactor were completed. Flash evaporation is used between reactors to remove volatile components from the polymer before it is transferred to the gas phase reactor. The loop reactor was operated at a temperature of 95°C and a pressure of 60 bar. Propane diluent, ethylene, hydrogen and polymerization catalyst (magnesium chloride based titanium chloride catalyst, manufactured and sold by Engelhard under the trade name Lynx 200 TM . Triethylaluminum is used as co-catalyst so that the molar ratio of the aluminum in the co-catalyst to the titanium in the solid catalyst component is about 20) into the reactor, and the flow rate of the reactor is such that the reactor conditions and polymer properties are as shown in Table 1 Show.

[0114] Example

1

2

3

C 2 concentration

mol%

5....

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PUM

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Abstract

The invention relates to novel multimodal polyethylene polymers comprising a low molecular weight fraction and a high molecular weight fraction, and having a MFR5 of greater than 0.10 g / 10 min and less than or equal to 0.22 g / 10 min, and a density of greater than equal to 952 kg / m<3>. The invention also relates to uses of the novel polymers in the production of polymeric articles, especially pipes.

Description

technical field [0001] The present invention relates to a multimodal polyethylene polymer composition and the use of the composition in the production of polymer articles, especially pipes. Background technique [0002] Pipes made of polymeric materials have various uses such as fluid transport, ie transport of liquids or gases such as water or natural gas. During transfer, the fluid is normally pressurized. Also, the transported fluid may have a varying temperature, typically in the range of 0°C to 50°C. The pipe under pressure is preferably made of polyolefin plastic, usually such as medium density polyethylene (MDPE; density: 0.930 ~ 0.942g / cm 3 ) and high-density polyethylene (HDPE; density: 0.942~0.965g / cm 3 ) of unimodal or bimodal vinyl plastics. [0003] As used herein, "pressure pipe" means a pipe that is under positive pressure in use, ie, the pressure inside the pipe is higher than the pressure outside the pipe. [0004] Polymeric pipes are usually produced b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L23/08C08L23/04
CPCC08L23/08C08L23/04C08L2666/06C08L23/06C08L2203/18C08L2205/02
Inventor 马茨·贝克曼埃里克·范普雷特雷姆克·范玛丽昂
Owner ボレアリステクノロジーオイ
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